Carburetor



Dec. 7,1926. 1,610,152

' A. J. RENARDu I 4 cARBUREToR l Filed sept. 18, 1925 gmk;

Alberi. J Renard UNITE snes 'e OFFICE.

ALBERT' a. RENARD, or erreur., MINNESQTA.

CABBUBETOB.

applicativa ned september 1a, r192s. serial m. 57,200.

The present invention relates to a 'carl the. exhaust manifold of the motor. The buretor for internal combustion motors. tube is then led from the exhaust manifold It is common practice in feeding gasoline, to a Venturi throat in open2 communcationf or/ other liquid fuel to the cylinders of an with `the intake manifold f the motor. A 5`internal lcombustion-motor, to draw avcurspring controlled air intake valve is oper- 6.0 rent of air over an open-jet of the'fuel to atively mounted to' control the amount of thereby force the air toipick up the fuel from air passing through the venturi, and a conthe jet and carry it into the cylinders in trol valve is operatively mounted on the mothe form of anexplosive mixture with. the tor' side of the venturi to control the flow air. 4 l o f the gas mixture through the device. 65 Then gasoline is thus drawn from a jet by These and other features of the invention, means of a rapidly passing current of air, a not specifically mentioned, will bemore fully large portion ofthe gasoline is vaporized, brought oiit in the following description and but some may remain in' the form of small the accompanying drawings, wherein: t drops, and these,'upon striking the walls of Figure 1 is a view inside elevation, partly 70 the intake manifold of the motore adhere in section, of a carburetor made in accordto said walls and may be drawn into the cyl-- ance with the present invention, the intake inders in the form of a liquid rather than I n vand exhaust manifolds of a motor being the form of'a gas. It is wellknown that shown therewith.

' 20 gasoline in a liquid form not an explosive Figure 2 is a view in enlarged vertical sec- 75' j substance, but acquires an explosive quality tion of a gasoline well; and upon being mixed with a definite quantity Figure 3 is a view in enlarged top land of air. Various expedients have been em side elevation respectivelyfof a 'spring conployed to prevent drops of gasoline from trolled air valve.

condensing out of the mixt re after gasoline Referring to the drawings indetail, an in- 8 has been` mixed with air y being drawn take manifold 1 and an exhaust manifold 2 through a carburetbr, but most of these exare represented in the" positions which they pedients are almedat revaprizng the llqoccupy when operatively mounted upon one uid after condensaticin.` type of automobile motor. Connected to the An object of the'presentinventioxn is to lower end of the intake manifold lby means 85 `v draw gasoline in liquid formfrom a jet, mix of bolts 3 isA a mixing chamber 'A having a it with'asmall quantity'of air, and su er- [Venturi throat llafix'ed'-therein. The venheat'the mixture of gasoline and airl an t0 turi is. provided with a peripheral groove 5l then pass saidmixture; through a device havingfa plurality of air inlet ports 6 ex- 85 where a sufficient quantity of air will be .tending therefrom to the interioroftlie Ven- 90 added tomake an explosive vapor thereof. turi throat. A hole 7 is drilled in the wall Another object is to mix gasoline and of thej mixing chamber A to communicate air in non-explosive proportions, heat the with thel groove `5, and into this hole` is non-Oexploslive mixture thus formed, and pass threadedly inserted a tube 8. The tube 8 said non-explosive mixture through-a device vpasses upward' land through the wall of 95. "where a sulicient quantity ofv air is added the exhaust 'manifold at 2, thence interior to the mixtureto make an explosive mixture ly of the exhaust man'fold-to the point 9, thereof. whence it again emerges from the exhaust In order to attain these objects, thereiis manifold and passes downwardly and is con provided, .in accordance with one featiire of necte'd to a mixing Well B. The mixing- 1.00 the invention, a float chamber of an orchamber A is provided 'with atop 10 condinary type, having a well connected thereto nected to the body of the mixing chamber to with the top of the Well slightly above the form an air-tight joint therewith.. A rod norinal level; of gasoline in the float cham- 11 isthreadedly mounted in thetop-of the ber. A needle valve is operatively-mounted chamber A and 'is provided with a. knurled 195' in the well to regulate the flow of gas top 12 by means of which the rod may be rothrough the well. A housing surrounds the tated -to change its vertical position in' the well and is provided with a perforation latchamber, and a lock nut 13 bywhich the rod erally adjacentl the-top of the well. A tube `11 may be secured against rotation. A

' -is connected'to the housing and passes intoivvasher LlI is integrally connected to the rod 1.10

I 11 after the rod is threadedly inserted in the avalve 16, shown in detail in Figure 3, the

top 10, and forms a stop to limit the upward movement of the rod, and also acts as a seat for the upper end of a coil spring L15. The lower end of the coil spring is connected to ycentral opening 17 'of which is slidably mounted upon the -rod 11, the outer edge ofl the valve seating upon a shoulder 18 formed around an. opening 19 in the bottom of the valve chamber'A. A plurality of perforations 20 are provided in the valve 16 to provide air inlet means when the motor is running at low speed, to` thereby prevent the valve from chattering.. when a small quan tity of'air isbeing drawn therethrough. Thef spring tension holding the valve. 16 on its vseat may beincreased by screwing the rod verse of said operation.

v'11 downward to force the Iwasher 14 downwardly against the top of the-spring 15 to compress it, and may be decreased by-the re;

A bracket 21 integral with the valve housf-ing extends laterally therefrom and forms a support for a float chamber B. The float chamber is of a conventional type, having a valve 22 connected to' a float 23. A gasoline feed pipe 24 of an ordinary type is connected to a gasoline supply tank, not shown.

In open communication with the interior of the float chamber is a laterally extending hollow arm v25 upon which is threadedly` mounted a bottom closuremember 26 of a feed well C. The detailed lstructure of the feed well is shown in'l Figure 2'.

In the feed well the bottom closure mem- ,ber 26 is integrally connected to a lower tubular member 27 having a band 28 integrally connected to the interior of the upper portion thereof, as by welding, the band 28 extending above the upper edge of lower tubular member 27. and being threaded to receive a tubular upper portion 29. Integrally connected to the` interior of the upper tubular vportion l29, is a housing 30 which extends downward into the lower tubular member v and a needle valve 35 of conventional type to have close slidablerl contact over a feed pipe 31 which is thradedly inserted in the bottom closure member26i The' housing 30 is provided with a plurality of air inlet passages 32, located closely above the top of the feed pipe 31; anda vent 33 in the side of the lower tubular member 27 (see Figure 1) is provided tosupply air to the vinlets 32. A top closure" member 34 is threadedly connected to the top of upper tubular member 29 to have air tight connection therewith,

4is threadedly mounted centrally ofthe top closure member to regulate the flow of gasol I line throughthe feed pipe' An electrical. heating coll 36 lof a conven- @tional type is positioned to surround the up- -w'ardly extending tube 8 at a point4 preferablycloselyadjacent the venturi-4 to provide means for heating the tube -8 when starting the motor in cold weather.

. .In operation, a partial vacuum is created in the Vintake manifold 1 by cranking the motor, and this in turn, through the tube 8, creates a partial vacuum in the upper portion of the intake well above the housing member 30. The float 23 is adjustedto maintain the gasoline levelin the feed pipe 31 closely7 adjacent the top thereof, and when a partial vacuum is created in the upper portion of the feed well airis drawn throu'gl1- t h'e opening 33 in the side of the lower tubular member 27 and passes through the inlet passages 32 into the housing 30: As the vair passes through the inlet passages 32 it picks up a quantity of gasoline from the feed pipe 31 and conveys it in the form of a partial vapor through. the tube 8 and thence to the openings 6in the venturi 4. Simultaneously with the drawing of the partially formed vapor through the tube v8, a quantity of air is drawn past the valve 16 and through the venturi. As the air passes through the venturi it picks up the partially formed vapor, passing through the ports 6 andcarries it into the cylinders of the motorwhere itlis exploded by an electrical spark in a conventional manner. f

In starting the motor in cold weather, the resistance coil 36 maybe connected with a source of electrical current .such as a storage battery, not shown, for a short period of time prior to starting the motor,'approxi mately thirty seconds being sufficient in or"- dinary cases. formed )vapor passing throughthe tube 8 and expedites its vaporization. v motor has been operating for a short time, exhaust gases, passing through the manifold l2, heat the tube 8 to a high temperature and This heats the partially After' the vaporize any liquid gasoline present in the tube 8. After the tube 8 becomes heated it is possible to use afuel having a lower vaporization point than gasoline, such as kerombtor comprising a fuel well, a housing sur rounding said fuel well, said housing being A carburetor for an internal combustion provided with perforations to admit a rela- A tively'small quantity of air into the interior of said housing when the pressure in the housing is reduced below atmospheric pres-.- sure, a Venturl throat 1n open communica-` Y tion with the intake manifold of the motor, a Venturi throat, said feed means being posicontrolled air valve operatively associated 'tioned with respect to the exhaust manifold with the Venturi throat, feedl means conof the motor tovheat the vapor and prevent 10 necting the interior ofthe housing 'surroundcondensation of liquid -gasoline therefrom.

ing the fuel well with the Venturi throat to In testimony whereof I aix my signature.

conduct a.' vapor of gasoline and air from the v i housing surroundingl the feed `well to the ALBERT J. RENARD.' 

